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| author | Williams, Mitch A <mitch.a.williams@intel.com> | 2010-02-10 02:43:04 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-13 01:56:07 +0100 |
| commit | fb8a0d9d1bfd1e4355f307e86a6da7209eefd5f3 (patch) | |
| tree | 99f23a4bc7c51343619f63970e5d017d75b5a66f /drivers/pci | |
| parent | udp: remove redundant variable (diff) | |
| download | linux-fb8a0d9d1bfd1e4355f307e86a6da7209eefd5f3.tar.xz linux-fb8a0d9d1bfd1e4355f307e86a6da7209eefd5f3.zip | |
pci: Add SR-IOV convenience functions and macros
Add and export pci_num_vf to allow other subsystems to determine how many
virtual function devices are associated with an SR-IOV physical function
device.
Add macros dev_is_pci, dev_is_ps, and dev_num_vf to make it easier for
non-PCI specific code to determine SR-IOV capabilities.
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/iov.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index b2a448e19fe6..3e5ab2bf6a5c 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -706,6 +706,21 @@ irqreturn_t pci_sriov_migration(struct pci_dev *dev) } EXPORT_SYMBOL_GPL(pci_sriov_migration); +/** + * pci_num_vf - return number of VFs associated with a PF device_release_driver + * @dev: the PCI device + * + * Returns number of VFs, or 0 if SR-IOV is not enabled. + */ +int pci_num_vf(struct pci_dev *dev) +{ + if (!dev || !dev->is_physfn) + return 0; + else + return dev->sriov->nr_virtfn; +} +EXPORT_SYMBOL_GPL(pci_num_vf); + static int ats_alloc_one(struct pci_dev *dev, int ps) { int pos; |